3a457e6ad6
Many of our tests in `tests/lean/run/` produce output from `#eval` (or `#check`) statements, that is then ignored. This PR tries to capture all the useful output using `#guard_msgs`. I've only done a cursory check that the output is still sane --- there is a chance that some "unchecked" tests have already accumulated regressions and this just cements them! In the other direction, I did identify two rotten tests: * a minor one in `setStructInstNotation.lean`, where a comment says `Set Nat`, but `#check` actually prints `?_`. Weird? * `CompilerProbe.lean` is generating empty output, apparently indicating that something is broken, but I don't know the signficance of this file. In any case, I'll ask about these elsewhere. (This started by noticing that a recent `grind` test file had an untested `trace_state`, and then got carried away.)
24 lines
577 B
Text
24 lines
577 B
Text
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partial def reverse {α} (as : List α) : List α :=
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let rec loop : List α → List α → List α
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| [], r => r
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| a::as, r => loop as (a::r)
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loop as []
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#guard reverse [3, 2, 1] == [1, 2, 3]
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#guard reverse [1, 2, 3, 4] == [4, 3, 2, 1]
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#print reverse
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#print reverse.loop
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#print reverse.loop._unsafe_rec
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partial def appendRev {α} (extra : List α) (as : List α) : List α :=
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let rec loop (as acc : List α) : List α :=
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match as, acc with
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| [], r => extra ++ r
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| a::as, r => loop as (a::r)
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loop as []
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#guard appendRev [3, 4] [1, 2, 0] == [3, 4, 0, 2, 1]
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